Adding machine

ABSTRACT

An adding machine in which a &#39;&#39;&#39;&#39; 1/2 &#39;&#39;&#39;&#39; key provided on a key board in addition to numeral setting keys for numeral 0 - 9 and function keys is operatively connected with the numeral setting mechanism for &#39;&#39;&#39;&#39;5&#39;&#39;&#39;&#39; key and a mechanism is provided for automatically selecting a 0-pin depending upon whether the lowest digit position of a numeral set in the machine is &#39;&#39;&#39;&#39;0.0&#39;&#39;&#39;&#39; or &#39;&#39;&#39;&#39; 1/2 (0.5),&#39;&#39;&#39;&#39; whereby &#39;&#39;&#39;&#39;0&#39;&#39;&#39;&#39; is automatically added to the numeral set in the machine only when the &#39;&#39;&#39;&#39; 1/2 &#39;&#39;&#39;&#39; key is not depressed, while &#39;&#39;&#39;&#39;5&#39;&#39;&#39;&#39; is added when the &#39;&#39;&#39;&#39; 1/2 &#39;&#39;&#39;&#39; key is depressed, and thus the addition or subtraction of numerals is performed with the digit positions of one numeral in accord with those of another numeral.

[ June 26, 1973 ADDING MACHINE Inventors: Ryoichiro Koshi, Mitaka, Japan;

Gian Piero Barozzi; Giancarlo Horeschi, both of Rossi, Italy Citizen Watch Co., Ltd., Shinjuku-ku, Tokyo, Japan Filed: Dec. 28, 1970 Appl. No.: 101,967

[73] Assignee:

[30] Foreign Application Priority Data July 6, 1970 Japan 45/58896 References Cited UNITED STATES PATENTS 800,210 9/1905 l-linchman 235/60 TK 3,084,855 4/1963 Gassino 235/60 TK 3,156,411 11/1964 McEvoy 235/60 TK Primary Examiner-Stephen J. Tomsky Assistant ExaminerStanley A. Wal Attorney-Wil1iam D. Hall, Elliott 1. Pollock, Fred C. Philpitt, George Vande Sande, Charles F. Steininger and Robert R. Priddy [57] ABSTRACT An adding machine in which a as key provided on a key board in addition to numeral setting keys for numeral 0 9 and function keys is operatively connected with the numeral setting mechanism for 5 key and a mechanism is provided for automatically selecting a 0-pin depending upon whether the lowest digit position of a numeral set in the machine is 0.0 or A (0.5), whereby 0 is automatically added to the numeral set in the machine only when the 1% key is not depressed, while 5 is added when the 92 key is depressed, and thus the addition or subtraction of numerals is performed with the digit positions of one numeral in accord with those of another numeral.

1 Claim, 8 Drawing Figures PMENIEDJnnas I873 SHEETBIIB mhmm, "T ,bzn J v 3 H INVENTOR Yync-Hno Kosm Gm T m ATTORNEY ADDING MACHINE This invention relates to an adding machine comprising a numeral setting mechanism including set up keys by which the respective digit positions (units) of a number to be added are set, a function mechanism for storing the number set by said numeral setting mechanism in a storage mechanism and for operating the machine to make the result of addition to the user, and a mechanism for automatically selecting a O-pin depending upon whether the lowest digit position of the number to be set is 0.0 or /2 (0.5), and further having a non-decimal unit addition mechanism at the lowest digit position.

In using a conventional adding machine, when the necessity arises to add 6 unit at the lowest digit position as in the case-of 123 456 $6 579 V2, it has been customary to set 1230 first in the machine instead of I23 and then 456 /2 4565) is added thereto. Therefore, there has been the disadvantage that must always be added to the numbers to be added which do not have /2 at their lowest digit positions and such practice induces an error and degrades the operation efficiency of the machine.

It is, therefore, the object of the present invention to provide a novel adding machine which is simple in operation and can be produced ata low cost, and which is free of the disadvantage set forth above of the conventional adding machine.

Namely,'according to the present invention there is provided an adding machine which is so designed that a /2 key is operatively connected with a mechanism associated with a 5 key, and when a number which does not have a /2 unit at the lowest digit position is set in the machine, 0. is automatically added to the set number, whereas when a number which has a 1% unit at its lowest digit position is set in-the machine, 5 is automatically'added-to the lowest digit position, whereby the addition operation of the numbers having a /2 unit at the lowest digit position and the numbers which do not have such unit at the lowest digit position can be achieved without requiring a special key operation in which each numeral is set in accord with its digit position. 1

The adding machine of the invention will be described in detail by way of example with reference to the accompanying drawings, in which:

FIG. 1 is a view showing the key arrangement on a key board;

NUMERAL SETTING MECHANISM As shown in FIG. 1, setting keys include keys I from numeral 1 to 9, a 0 key 2 for shifting a pin box one column, a 00" key 2 for shifting the pin box two columns and a key 3 for setting numeral k. The keys 1, 2 are all of the substantially same construction, and each setting lever 4 is pivoted about the pivot 6 to a key board 5 and has a pin pushing bar 7 connected to the lower end thereof as shown in FIG. 2. The bar 7 is biased in one direction by a spring 8 and, therefore, the setting lever 4 is constantly biased upwardly.

The forward ends of the pin pushing bars 7 are concentrated to one location on a plane as shown in FIG. 3, and slidably received in grooves formed in a guide plate 9 (FIG. 2) to be operated by the associated setting key 4, said guide plate 9 being secured to a machine frame. Each pushing bar 7, as shown in FIG. 3, is provided with a step 10 at one side thereof for abutting engagement with an upright portion 11a of a sliding bar 11. The forward end of the sliding bar 1 l is slidably received in a groove formed in the guide plate 9 and the other end thereof is provided with a slot which 7 is in slidable engagement with a pin 12 secured to the machine frame. The sliding bar 11 is biased to the left as viewed in FIG. 2, by a spring 13. A column shifting lever 14 is pivotably supported by a fixed shaft 15 adjacent the sliding bar 11 and held in engagement with said sliding bar 11 at a projection 14a under the biasing force of a spring not shown. A pin box 16 is slidably mounted at its upperend on a shaft 17 fixed to the machine frame, with .the lower end thereof being slidably received in a guide plate 18.- This pin box has pins 19 corresponding to numerals l 9 and a pin 20 corresponding to numeral 0 slidably mounted therein. The O-pin 20is biased to the left as viewed in FIG. 2, by

' means of aspring not shown, to be held in abutting en- FIG. 2 is a side elevational view of a numeral setting mechanism;

FIG. 3 is a plan view partially showing a pin box'portion; I

FIG. 4 .is a side elevational view of a function key mechanism; FIGS. 5 m7 are plan views of a O selecting mechanism, ofwhich FIG. 5 is a view of the 0 selecting mechanism in astationary position before the machine is set in motion, FIG. 6 is a view showing the 0 selecting mechanism in a portion when the function key is operated without previously operating the /2 key; and FIG. 7 is a view showingthe 0 selection mechanism in a position when the function key is operated after operating the 6 key; and FIG. 8 is aside'elevational view of a pin return mechanism.

gagement with the forward end of the column shifting lever 14 and therebythe pin box is held in its position. Stopper pins 21 are fixed at'the top end of the pin box, each of which has a shape as shown in FIG. 3, and said pins 21, an upper projection 11b of the bar 11 and the column shifting lever 14 constitute an escapemcnt. Therefore, when a desired key 1 is depressed, the associated pin 19 or 20 is pushed forward by theassociated pin pushing bar 7 which is operatively connected with the associated numeral setting lever 4, and thus a desired numeral is set in the machine. Further, the sliding bar 11 in engagement with the step 10 of the pin pushing bar 7 is also caused to slide to the right as viewed in FIG. 2, causing the column shifting lever 14 to rotate in a clockwise direction as viewed in FIG. 2, so that said column shifting lever 14 is released from engagement with the O-pin 20. I g

Consequently, the pin box 16 is shiftedunder the biasing force of a spring (not shown). On the other hand, the upper projection 11b. of the sliding bar l1 is brought into engagement with the pin 21 upon sliding movement of said sliding bar 11. Therefore, the movement of the pin box is stopped at a'point about a half pitch from the previous position. When the pressure is removed from the numeral setting key 1, the numeral setting lever 4 and the sliding bar 11 are returned to the positions shown in FIG. 2 (the positions before the nu meral setting operation was commenced) by the springs. As a result, the 'pin' 21 is released from engage, ment with the sliding barll and the pin box is again moved by the spring. On the other hand, the column shifting lever 14 is returned to the original position (the position shown in FIG. 2) by the spring, concurrently with the return movement of the sliding bar 11, and brought into engagement with the O-pin in the next column in a one column shifted position. The abovedescribed cycle of numeral setting operation is repeated, whereby desired numerals are set in the pin box one after another.

Incidentally, an arrangement is made such that when the key or the 00 key 2 is depressed, one or two O-pins 20 are pushed forward and the pin box is shifted one or two columns.

Of the pin pushing bars 7, the one corresponding to numeral has a different configuration from that of the other numeral setting levers and has a branched bar 7a connected with the numeral setting lever 22 of the /2 key 3.

A setting lever 22 of the /2 key 3 is also pivoted about the pivot 6 to the key board 5, similar to those of the numeral setting keys 1, 2, and the aforesaid bar 7a, branched from the pin pushing bar 7 for numeral 5, is connected to the lower end thereof. The bar 7a is biased in one direction by the spring 8 so that the setting lever 22 is constantly urged upwardly. Thus, it will be understood that when the V2 key 3 is depressed, the pin for numeral 5 of the pin box 16 is set as in the case when the key 1 for numeral 5 is depressed. Inaddition, the lower end 22a of the setting lever 22 is opposed by a lock lever 23 (FIGS. 5 to 7) so that a 0 pin pushing lever of an O-pin automatically setting mechanism to be described later will notbe actuated when the /27 key 3 is depressed.

FUNCTION KEY MECHANISM clear. The markings O and are on a common key and the markings and k are also on a common key. Namely, these keys are so-called double-action keys.

As shown in FIG. 4, each of the function keys 24 is secured to a function lever 25 which is slidable in the directions indicated by the arrows and is normally biased upwardly by a spring 26. Reference numeral 27 designates a slide plate by which a clutch and a switch (not shown) for starting the machine are operated. The slide plate 27 is provided with notches 29 for cooperation with a pin 28 fixed on the function lever 25, and two slots 31 for engagement with two fixed guide pins 30 respectively. The slide plate 27 also has a projection 27a extending downwardly through a bottom frame 32 of the machine, with the lower end thereof in engage ment with a fork of a lever 33 (FIGS. 5 to 7) of the O-pin setting mechanism to be described later.

O-PIN SETTING MECHANISM As shown in FIG. 5, the lever 33 is pivotally mounted on a fixed shaft 34 for pivotal movement thereabout, and is formed with the aforesaid fork 33a at one end thereof for engagement with the projection 27a of the slide plate 27, the other end thereof being connected to a claw member 35 by a pin 36. The claw member 35 is pivotable about the pin 36 and has a projection 35a for abutting engagement with a fixed stopper pin 37 and a notch 35b for engagement with a bent lug 38a formed at one end of a lever 38. A spring 39 is extended between the lever 35 and the lever 33, to pull said lever 35 in a clockwise direction. The lever 38 is pivotably connected to a lever 40 by a pin 41 and has a bent lug 38b formed at the other end for engagement with a step 32a formed in the bottom frame 32 of the machine, and a spring 42 is extended between said levers 38 and 40. The lever 40 is mounted on a fixed shaft 43 for pivotal movement thereabout, and is formed with a gourd-shaped hole 44 and a projection 40a. A 0-pin setting lever 45 is formed with a slot 45a for receiving a fixed guide pin 46 and has a pin 47 fixed thereon which is received in the aforesaid. gourdshaped hole 44 in the lever 40. A spring 49 is extended between said O-pin setting lever 45 and a stationary frame 48, to biase said O-pin setting lever 45 in one direction such that one end 45b of said lever 45 is posi tioned opposite to the projections 20a of the O-pins 20 The lock lever 23 which is operated by the setting lever 22 of the V2. key 3 as stated in the description on the numeral setting mechanism, is pivotally mounted on a fixed shaft 46, and is provided with a projection 23a for locking engagement with a pin 47 on the O-pin setting lever 45 and projections 23b, 230 for stopping a pivotal movement thereof.

Namely, when the lock lever 23 is rotated in a clockwise direction about the shaft 46, the projection 23b abuts against the fixed shaft 34, whereas when said lock lever 23 is rotated in a counterclockwise direction, the projection 23c abuts against a fixed shaft 50, to hold it against rotation. The lock lever 23 also hasa pin 51 fixed thereon and a -shaped spring 52 is extended between said pin 51 and the fixed shaft 34, so as to urge the lock lever 23 to rotate in a counterclockwise direction. Reference numeral 53 designates a return lever which is provided with guide slots 54, 55 through which the fixed shafts 50, 43 are extended respectively, and with a projection 53a in opposed relation to the pin 51 on the lock lever 23 for causing a return movement of said lock lever 23. A bent'lug 53b formed at a portion of the return lever 53 serves to cause a return movement of the lever 40. The return lever 53 is also provided with an engaging portion 53c which is engaged in a hole 56a formed in a pin restoring slide plate 56 of a pin restoring mechanism to be described later.

' PIN RESTORING MECHANISM After a numeral to be added or subtracted has been set on the pins 19 and 20 of the pin box 16 and then stored in a storing mechanism (not shown), the pin restoring slide plate 56 is moved in the direction of the arrow as shown in FIG. 8, by known means. The pin restoring slide plate 56 has a pin clearing plate 57 fixed thereto by a pin 58, which extends over the span of the pins 19 of the pin box 16 and serves to return all the pins 19 and 20 which have previously been projected forward incident to the numeral setting operation, to their original positions. The pin restoring slide plate 56 and the pin clearing plate 57 are pivotably connected with a lever 59 which in turn is pivotally mounted on a fixed shaft 60 for pivotal movement thereabout. Thus, it will be seen that when the pin restoring slide plate 56 is moved horizontally to the left by the known means, the pin clearing plate 57 is also moved to the left to return all the projected pins to their original positions.

As stated previously in the description on the O-pin setting mechanism, the return lever 53 is connected with the pin restoring slide plate 56 at the engaging portion 530. Therefore, the horizontal movement of the pin restoring slide plate 56 causes the return lever 53 to move to the left. As the return lever 53 moves to the left, the bent lug 53b thereof depressed the lever 40, causing said lever to make a pivotal movement in a clockwise direction about the fixed shaft 43 (FIG. 6), so that the O-pin setting lever 45, connected with said lever 40 by the pin 47, is also actuated. Namely, the O-pin setting lever 45 is caused to move to the left as viewed in FIG. 8.

Now, the operation of the adding machine according to the invention will be described by way of practical example. When the addition of 123 425 V: 548 be, for example, is to be desired, the numeral setting keys 1 corresponding to numeral 123 are depressed at first, whereupon the numeral setting levers 4 corresponding to the respective keys are caused to make a pivotal movement in a counterclockwise direction about the pivot points 6 of the key board respectively as shown in FIG. 2. As a result, the pin pushing bars 7 connected to the respective setting levers 4 are moved to the right to project the associated pins 19 forward, and thus numeral 123 is setin the pin box 16. Then, the 4 (plus) key'of the function keys 24 is depressed, whereupon the,p in 28 of the function key 24 depresses the edge of the notch in the slide plate 27, so that said slide plate 27 slides in the direction of the arrow by being guided by the-two fixed guide pins 30 and actuates the clutch and the switch in the known manner to start the machine. v j

lmin'ediatelyfbefore the machine starts its operation, the O-pin settingmechani s'm is actuated by the sliding movement of the slide plate 27. Namely, the projection 27a of the slide plate 27 operates the lever 33 and the O-pir r setting mechanism is shiftedfrom the stationary position of FIG. 5, before thestart of the machine, to the position of F IG. 6. Practically, when in FIG. 5, the lever 33 is pivotally moved in a clockwise direction about the shaft 34, the claw member 35 which is pivotally"connected to said lever 33, pulls the lever 38 through the engagement between the notch 35b of said claw member 35 and the bent lug 38a of said lever 38 and hence said lever 38 is caused to make a pivotal movement in a counterclockwise direction about the pin 41 with the result that the bent lug 38b is released When the O-pin setting lever 45 moves towards the pin box 16 as stated above, it pushes the projection 20a of the O-pin 20 at its end 45b, so that the escapement is actuated and the pin box 16 is shifted one column in the direction of the arrow. This means that 0" is added automatically. In this case, the O-pin setting lever 45 is urged in a counterclockwise direction about the fixed pin 46, by the force of the pin box 16 moving in the direction of the arrow and thus does not interfere with the movement of the pin box 16.

By the operation described above, 0 is added to set numeral 123 and after all, numeral 123.0 is set in the pin box 16.

Theabove-described operation is completed before a rack (not shown) is actuated. Upon actuation of the rack, numeral 123.0 is stored in the storing mechanism in the known manner and printed. The pin restoring slide plate is thereafter actuated to clear numeral 123.0 previously set in the pin box 16. Namely, as shown in FIG. 8, when the pin restoring slide plate 56 is moved to the left by known means, the pin clearing plate 57 connected integrally with said pin restoring slide plate 56 and pivotally connected with the lever 59 is moved to the left by said pin restoring slide plate 56, whereby the projected pins 19, 20 are pushed back to the left or, in other words, numeral 123.0 is cleared.

The return lever 53 is connected with the pin restoring slide plate 56, with the engaging portion 53a of the former being engaged in the slot 56a in the latter. Therefore,'the return lever 53 is also-operated by the I pin restoring slideplate 56; When the return lever 53 from the step 32a formed in the bottom frame 32 of the machine. Since the lever 38 and the lever 40 are pivotally connected with each other by the pin 41 and the fixed pin 47on the O-pin setting lever 45 is engaged in the gourd-shaped hole 44 in the'lever 40, when the bent lug 38b of the lever 38 is disengaged from the step 32a of the bottom'frame 32 of the machine, the O-pin setting lever 45 moves towards thepin box 16 under the biasing force of the spring 49.

is moved in the direction of the arrow in FIG. 6, the lever 40 is depressed by'the bent lug 53b of said return lever 53, so that the lever 40 is caused to make a pivotal movement in a clockwise direction about the fixed shaft 43, and the O-pin setting lever 45 connected with said lever 40 by way of the pin 47 and the lever 38 connected with said lever 40 byway of the pin 41 are moved downwardly. g

When the lever 38 moves downward, itmakes a pivotal movement in a counterclockwise direction about the pin 41 under the biasing force of the spring 42 and the bent lug 38b thereof is brought into engagement with the step 32a of the bottom'frame of the machine, as it was initially. I

Then, the pin box 16 returns to its original position while sliding on the shaft 17 and the slide plate 27 is moved in the direction of the dotted line arrow in FIG. 4 by known means, so that the pin 28 on the function key 24 is pushed upward and thus the function key 24 is returned to its original position. At the same-time, the lever 33 is pushed by the slide plate 27 to make a pivotal movement about the fixed shaft 34 in a counterclockwise direction as viewed in FIG. 6, so that the notch 35b of the claw member 35 is brought into engagement with the lever 38 and holds said lever 38 in the original position. Namely, the O-pin setting mechanism is shifted from the position of FIG. 6 to the stationary position of FIG. -5 before the next start of the machine. The machine ceases its operation thereafter.

When numeral 425 A to be added to numeral l23 is set by the numeral setting keys, the corresponding pins in the pin box 16 are set by the same op eration as described above. In this case, since the pin pushing bar of the be key 3 is integral with that of the key 1 for numeral 5 as shown in FIG. 2, the numeral which has actually been set is 425.5. Describing this more practically, when the b key 3 is depressed, the numeral setting lever 22 is caused to make a pivotal movement in a counterclockwise direction about the pivot point 6 and the lock lever 23 is moved by the lower end 22a of said lever 22 to the position indicated by two-dot chain line in FIG. 2. As a result, the numeral setting lever 22 is caused to make a pivotal movement in a counterclockwise direction about the fixed pin 46 from the position of FIG. to the position of FIG. 7, until the end 23c thereof abuts against the fixed shaft 50. In this position, the end 23a of the lock lever 23 is located in front of the pin 47 fixed on the O-pin setting lever 45 to block the forward movement of said O-pin setting lever 45, and the end 23c thereof is held in abutment against the fixed shaft 50 under the biasing force of the spring 52.

Then, the (plus) key of the function keys 24 is depressed, whereupon the pin 28 on said function key 24 depresses the edge of the notch 29 in the slide plate 27 in FIG. 4, similar to the case described previously, and thus the sliding plate 27 is moved in the direction of the arrow while being guided by the two fixed guide pins 30, to actuate the clutch and the switch in the known manner.

Immediately before the machine starts its operation, the O-pin setting mechanism is actuated by the sliding movement of the slide plate 27. Namely, the projection 27a of the slide plate 27 operates the lever 33 and the O-pin setting mechanism is shifted from the stationary position, before the start of the machine, of FIG. 5 to the position of FIG. 7. Practically, when in FIG. 5, the lever 33 is pivotally moved in a clockwise direction about the shaft 34, the claw member 35 which is pivotally connected to said lever 33, pulls the lever 38 through the engagement between the notch 35b of said claw member 35 and the bent lug 38a of said lever 38 and hence'said lever 38 is caused to make a pivotal movement in a clockwise direction about the pin 41, with the result that the bent lug 38b is released from the step 32a formed in the bottom frame 32 of the machine. Since the lever 38 and the lever 40 are pivotally connected with each other by the pin 41 and the fixed pin 47 on the O-pin setting lever 45 is engaged in the gourd-shaped hole 44 in the lever 40 and further the pin 47 is locked by the end 23a of the lock lever 23 as shown in FIG. 7 by the same operation as in the case when the /2 key 3 is depressed, the O-pin setting lever 45 is movable only a distance corresponding to the gap between the pin 47 and the end 23a of the lock lever 23, even through the bent lug 38b of the lever 38 is released from engagement with the step 32a of the machine frame, and, therefore, the O-pin setting lever 45 stops its movement before it abuts against the projection 20a of the O-pin in the pin box 16. The abovedescribed operation is completed before the rack (not shown) is actuated. Upon actuation of the rack, numeral 425.5 is stored in the storing mechanism in the known manner and printed. The storing mechanism has numeral 123.0 already stored therein. Therefore, numeral 548.5 is after all stored in the storing mechanism. When the pin restoring slide plate is actuated thereafter, to clear numeral 425.5" set in the pin box, that pins 19 representing numeral 425.5 are cleared in the same manner as described previously. Then, the return lever 53 is moved in the direction of the arrow in FIG. 7. The pin 51 is pushed by the end 53a of the return lever 53, so that the lock lever 23 integral with said pin 51 is caused to make a pivotal movement in a clockwise direction about the fixed pin 46, until the end 23b thereof abuts against the fixed shaft 34, to the position shown in FIG. 5 and held in that position under the biasing force of the spring 52, with the end 23b thereof in abutment against the fixed'shaft 34.

Then, the pin box 16 returns to its original position while sliding on the shaft 17 and the slide plate 27 is moved in the direction of the dotted line arrow in FIG. 4 by the known means. At the same time, the lever 33, the claw member 35 and the lever 38 are returned to their original positions respectively, and the machine is shifted from the position of FIG. 7 to the position of FIG. 5. The machine stops its operation thereafter.

As described herein, according to the present invention the key is operatively connected with the numeral setting mechanism associated with the numeral 5 and 0 is automatically added to a set numeral only when the 1% key is not depressed, whereby a calculation is performed with the digit positions of one numeral in accord with those of the other numeral. Therefore, the possibility of miscalculation can be eliminated and the operation is simple, and further the machine can be manufactured at a low cost. Besides, the adding machine of the invention has the following additional advantages:

Namely, while the present invention has been described and illustrated herein in terms of a specific em bodiment wherein the $6 key is operatively connected to the numeral setting mechanism of the numeral setting key for numeral 5, according to the invention it is also possible to perform the addition .of 0.3 unit or 0.4 unit by providing a 0.3 key or 0.4 key, instead of the /2 key, and operatively connecting said key to the numeral setting mechanism of the 3 key or 4 key respectively.

Further, the adding machine of the invention is capable of performing a multiplication since the numeral setting key for a non-decimal unit at the lowest digit position commonly utilizes the pins in the pin box which are for decimal units. The conventional adding machines are incapable of performing a multiplication since the pins in the pin box are not utilized in the calculation of a non-decimal unit at the lowest digit position.

Still further, according to the present invention numeral 0 is added at the same time when the function key is depressed, without depressing the V2 key. Therefore, a time is not especially required for the addition of numeral 0. As contrasted, the conventional adding machines are designed such that 0" is added by the rotation of a cam shaft after the machine is set in motion by depressing a function key, and hence have the disadvantage that the calculation efficiency is low. Thus, the present invention achieves a number of advantages which are not possessed by the conventional machines.

We claim:

1. An adding machine comprising in combination:

numeral setting means including a plurality of numeral setting keys including at least one nondecimal unit key, a pin box, function means including at least one function key, O-pin setting means including a O-pin setting lever, and means controlled at least in part by said numeral setting key for selecting a O-pin dependent upon whether the lowest'digit position of the numeral set by said nuv but leaving said O-pin setting lever free to move upon actuation of said function key when said nondecimal unit key has not been actuated.

. m k k I- w 

1. An adding machine comprising in combination: numeral setting means including a plurality of numeral setting keys including at least one non-decimal unit key, a pin box, function means including at least one function key, O-pin setting means including a O-pin setting lever, and means controlled at least in part by said numeral setting key for selecting a O-pin dependent upon whether the lowest digit position of the numeral set by said numeral setting key is a non-decimal unit, said selecting means including means for locking said O-pin setting lever upon actuation of said function key when said non-decimal unit key has been actuated but leaving said O-pin setting lever free to move upon actuation of said function key when said non-decimal unit key has not been actuated. 